Hinge joint at elbow allows movement in one plane.
铰链关节—在手肘容许一平面的运动。
2
A support hinge is arranged on the rotary elbow and is fixed on a reversing frame.
在所述旋转弯头上设有支承铰链，支撑铰链固定在回转架上。
3
Right-elbow is in front of my body not jam to the side, my left arm is swinging towards the golf ball, and my wrists have maintained their hinge. My left arm is close to my chest;